shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity

[LLD] [MinGW] Add the --fat-lto-objects flag (#174962)

Browse Source 
This uses the same syntax as the ELF linker (added in
14e3bec8fc3e1f10c3dc57277ae3dbf9a4087b1c), mapping it to the recently
added COFF linker flag in
759fb0a224e85c01fffcd42b1e71a4bea6fc757e.
This commit is contained in:
Martin Storsjö 2026-01-09 10:24:42 +02:00 committed by GitHub
parent 66d41f8483
commit a2e8394997
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
3 changed files with 20 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
lld/MinGW/Driver.cpp
View File

@ -518,6 +518,10 @@ bool link(ArrayRef<const char *> argsArr, llvm::raw_ostream &stdoutOS,
add("-thinlto-object-suffix-replace:" + StringRef(arg->getValue()));
if (auto *arg = args.getLastArg(OPT_thinlto_prefix_replace_eq))
add("-thinlto-prefix-replace:" + StringRef(arg->getValue()));
if (args.hasFlag(OPT_fat_lto_objects, OPT_no_fat_lto_objects, false))
add("-fat-lto-objects");
else
add("-fat-lto-objects:no");
for (auto *a : args.filtered(OPT_plugin_opt_eq_minus))
add("-mllvm:-" + StringRef(a->getValue()));

8
lld/MinGW/Options.td
View File

@ -39,6 +39,11 @@ multiclass B<string name, string help1, string help2> {
def no_ # NAME: Flag<["--", "-"], "no-" # name>, HelpText<help2>;
}
multiclass BB<string name, string help1, string help2> {
def NAME: Flag<["--"], name>, HelpText<help1>;
def no_ # NAME: Flag<["--"], "no-" # name>, HelpText<help2>;
}
multiclass B_disable<string name, string help1, string help2> {
def NAME: Flag<["--", "-"], name>, HelpText<help1>;
def disable_ # NAME: Flag<["--", "-"], "disable-" # name>, HelpText<help2>;
@ -166,6 +171,9 @@ def lto_emit_asm: FF<"lto-emit-asm">,
HelpText<"Emit assembly code">;
def lto_sample_profile: JJ<"lto-sample-profile=">,
HelpText<"Sample profile file path">;
defm fat_lto_objects: BB<"fat-lto-objects",
"Use the .llvm.lto section, which contains LLVM bitcode, in fat LTO object files to perform LTO.",
"Ignore the .llvm.lto section in relocatable object files (default).">;
def thinlto_cache_dir: JJ<"thinlto-cache-dir=">,
HelpText<"Path to ThinLTO cached object file directory">;

9
lld/test/MinGW/driver.test
View File

@ -430,7 +430,7 @@ RUN: ld.lld -### foo.o -m i386pe --thinlto-prefix-replace=_foo 2>&1 | FileCheck
THINLTO_PREFIX_REPLACE: -thinlto-prefix-replace:_foo
RUN: ld.lld -### foo.o -m i386pep -plugin-opt=mcpu=x86-64 -plugin-opt=-emulated-tls -plugin-opt=thinlto -plugin-opt=O2 -plugin-opt=dwo_dir=foo -plugin-opt=cs-profile-generate -plugin-opt=cs-profile-path=bar 2>&1 | FileCheck -check-prefix=LTO_OPTS %s
LTO_OPTS: -mllvm:-mcpu=x86-64 -opt:lldlto=2 -dwodir:foo -lto-cs-profile-generate -lto-cs-profile-file:bar -mllvm:-emulated-tls
LTO_OPTS: -mllvm:-mcpu=x86-64 -opt:lldlto=2 -dwodir:foo -lto-cs-profile-generate -lto-cs-profile-file:bar -fat-lto-objects:no -mllvm:-emulated-tls
RUN: ld.lld -### foo.o -m i386pep --lto-O2 --lto-CGO1 --lto-cs-profile-generate --lto-cs-profile-file=foo 2>&1 | FileCheck -check-prefix=LTO_OPTS2 %s
LTO_OPTS2:-opt:lldlto=2 -opt:lldltocgo=1 -lto-cs-profile-generate -lto-cs-profile-file:foo
@ -478,3 +478,10 @@ WARN_RPATH: warning: parameter -{{-?}}rpath has no effect on PE/COFF targets
RUN: ld.lld -### foo.o -m i386pe --dependent-load-flag=0x800 2>&1 | FileCheck -check-prefix=DEPENDENT_LOAD_FLAG %s
DEPENDENT_LOAD_FLAG: -dependentloadflag:0x800
RUN: ld.lld -### -m i386pep foo.o 2>&1 | FileCheck -check-prefix NO-FAT-LTO %s
RUN: ld.lld -### -m i386pep foo.o --fat-lto-objects --no-fat-lto-objects 2>&1 | FileCheck -check-prefix NO-FAT-LTO %s
NO-FAT-LTO: -fat-lto-objects:no
RUN: ld.lld -### -m i386pep foo.o --no-fat-lto-objects --fat-lto-objects 2>&1 | FileCheck -check-prefix FAT-LTO %s
FAT-LTO: -fat-lto-objects{{ }}